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Engine Measurement

Engine Measurement. Measurement Tools. Steel Rule Feeler Gauges Precision Straightedges Calipers Dial Indicator. Measurement Tools Cont’. Micrometer Telescoping Gauges Small Bore Gauges Dial Bore Gauge Torque Wrench Torque Angle Gauge. Steel Rule.

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Engine Measurement

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  1. Engine Measurement

  2. Measurement Tools • Steel Rule • Feeler Gauges • Precision Straightedges • Calipers • Dial Indicator

  3. Measurement Tools Cont’ • Micrometer • Telescoping Gauges • Small Bore Gauges • Dial Bore Gauge • Torque Wrench • Torque Angle Gauge

  4. Steel Rule • Used for non precision (greater than 1/64th”) measurements • Available in a variety of lengths and designs

  5. Feeler Gauges • Thin metal strips used to determine clearances between two parts • Usually come in a set of .001” increment gauges • When the correct gauge is inserted between the parts a slight drag should be felt

  6. Precision Straightedge • Used with feeler gauges to measure for warpage on heads, blocks, flywheels, etc. • Generally does not have increment markings

  7. Calipers • Used to take inside, outside, or depth measurements • Generally accurate to .001” • Three different styles of caliper • Dial • Vernier • Digital

  8. Dial Caliper • Whole inches and tenths of an inch are read from the sliding scale

  9. Dial Caliper • Hundredths and thousandths of an inch are read from the dial

  10. Dial Caliper • These two numbers are added to find the actual measurement

  11. Dial Caliper Example 0” (whole inches) .9” (tenths) .038” (hundreds and thousandths) = 0.938”

  12. Vernier Caliper • Fewer moving parts than dial caliper • Slightly more difficult to use • Most vernier calipers measure both inches and centimeters

  13. Vernier Caliper

  14. Digital Caliper • Easy to use • Most expensive • Options such as saving measurements and zeroing available on some digital calipers

  15. Dial Indicator • Used to measure travel (example: valve travel) • Large dial reads in thousandths of an inch and small dial reads in tenths of an inch

  16. Micrometer • Used to precisely (within .0001”) take inside, outside, or depth measurements

  17. Telescoping Gauges • Used with an outside micrometer to take inside measurements

  18. Small Bore Gauges • Like telescoping gauges, small bore gauges are used with an outside micrometer to take inside measurements • Also called split ball gauges

  19. Dial Bore Gauge • Used with an outside micrometer to take inside diameter measurements • Measurements can be taken quickly

  20. Torque Wrench • Used to tighten fasteners to the proper torque • Four different types available • Click type • Beam type • Dial type • Electronic type • May measure in foot-ponds, inch-pounds, or Newton-meters

  21. Click Type • When proper torque is reached the wrench will “click” • Torque setting is adjusted with some type of a dial/knob

  22. Beam Type • Beam flexes as torque is applied and pointer indicates current torque level

  23. Dial Type • Current torque level is read from a dial

  24. Electronic Type • Vibrates when proper torque is reached • Many options available such as an actual torque reading, memory for saving torque specifications etc.

  25. Torque Angle Meter • Used to measure the number of degrees a fastener is being turned • Used for torque-to-yield bolts and/or when tightening specifications list a degree specification

  26. Micrometer Parts

  27. sleeve thimble anvil spindle frame This is a English micrometer

  28. 3 0 1 2 3 4 5 6 7 8 9 2 1 0 24 22 For clarity we will use an animated figure. 23

  29. Let’s take a close look at the sleeve of the micrometer.

  30. One inch (1.000) 25/1000 inch (0.025) 3 0 1 2 3 4 5 6 7 8 9 0 0 1 2 3 4 5 6 7 8 9 0 2 1 0 24 23 22 1/1000 inch (0.001) 1/10 inch (0.100)

  31. Now, an example...

  32. Smallest Measurement Largest sleeve reading 0 1 2 3 4 5 6 7 8 9 15 18 0 1 2 3 17 0.341 inches One mark past largest sleeve reading 16 15 14 13 Thimble Reading Now, an example... 19 18 17 16 0.000 15 14 13 0.300 0.025 0.016

  33. A digital micrometer

  34. Another example...

  35. Smallest Measurement Largest sleeve reading 0 0 1 2 3 4 24 23 22 21 3.496 inches 20 19 18 17 16 Thimble Reading Three marks past largest sleeve reading Another example... 20 15 3.000 0.400 0.075 0.021

  36. Review... • Lightly tighten on object. • Determine smallest measurement when micrometer is closed. • Find largest visible number on sleeve and multiply times 0.100.

  37. Review... • Count number of marks past largest visible number on sleeve and multiply times 0.025. • Multiply thimble reading times 0.001. • Add all numbers to get answer.

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